Sash-weight.



M. D. BINGHAM. SASH WEIGHT.

APPLICATION FILED JANA, 1912.

1,077,586. I Patented Nov. 4, 1913.

STATES FATE FFTQE.

MICHAEL D. BINGI-IAM, OF SOMERVILLE, MASSACHUSETTS.

SASH-WEIGHT.

T 0 all whom it may concern:

Be it known that 1, MICHAEL D. BINGHAM, a citizen of the United States,and a resident of Somerville, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements inSash-Weights, of which the following is a specification.

This invention relates to sash weights composed of sections or unitsadapted to be detachably coupled together to form a complete weight ofany desired sash-supporting capacity.

The invention has for its object to provide a simple and effective sashweight unit, adapted to be conveniently and securely coupled to anotherduplicate unit-.or units, the connected units being inseparable fromeach other when the units hang in alinement with each other, and theform of the coupling parts, or members of the units being such that whenthe units are relatively rough castings in accordance with the usualpractice, the coupling members require nogrinding or other finishing toadapt them for use.

The invention consists in the improvements which I will'now proceed todescribe and claim.

Of the accompanying drawings which form a part of thisspecification,Figures 1 and 2 represent elevations of different sides ofa sash weight composed of two units embodying my invention, one of theunits being broken away; Fig. 3, represents a.

section on line 33 of Fig. 2; Fig. 4 represents a section on line 4-4 ofFig. 2; Fig. 5 represents a view similar to Fig. 3 showing the lowerunit at an angle to the upper unit preparatory to engagement therewith;Fig. 6 represents in perspective the interlocking ends of two separatedunits.

The same reference characters indicate the same parts in all thefigures.

The sash weight unit of my invention constitutes one of a series of twoor more duplicate units, so that a description of one unit will besuflicient. The said unit is composed of an elongated body 12 which isshown as rectangular in cross section and having four fiat longitudinalsides or faces, although the body may be of circular or other form incross section.

In the lower end portion of the body 12 is formed a transverse recesshaving a back 13 formed by an extension of one of the sidesSpecification of Letters Patent.

Application filed January 4, 1912.

Patented Nov. 4, 1913.

Serial No. 669,688.

of the body, and a top 1-1 formed by the lower end of the main portionof the body 12.

15 represents a narrow elongated horn or seat which projects from theback 13 across the recess and has an upper surface which issubstantially at right angles with the longitudinal axis of the body 12,and is pref crably curved or inclined downwardly from its longitudinalcenter to its edges to form an extended bearing for a head 20 on theupper end of a duplicate unit.

16 represents a stop projecting downwardly from the top 14 of the recessand made narrower than the body 12, and also narrower than the depth ofthe recess, so that the stop is adapted to project between ears 21 whichsupport the head 20, as shown by Fig. 2, and to engage said head toprevent its withdrawal from the recess, as shown by Figs. 1 and 3.

The opposite end portion of the body 12, is provided with upwardlyprojecting cars 21, the upper portions of which are connected by a head20, preferably having the form incross section shown by Figs. 3, 4C and5, one side of the head being substantially flat, and the oppositesideconvex. Said ears and head form sides or walls of a transverseopening which receives the seat 15 of a duplicate unit when the twounits are operatively connected. The head 20 has a narrow rounded loweredge 20 which bears on the seat 15 of the duplicate unit, as shown byFigs. 1, 2 and '3. The ears 21 are ofiset from one side of the body 12,so that when two units are connected, their bodies are in alinement witheach "other.

The end portions of the bearing edge 20 are curved or inclineddownwardly by fillets 2O (Fig. 2) formed thereon, said bearing edgebeing thus adapted to conform closely to the form of the upper surfaceof the seat 15, so that the heat has a narrow elongated bearing on theseat, as indicated at the lower portion of Fig. 2.

The head 20 of the upper unit engages the bight of a sash cord 23, thefillets 20 maintaining said bight in a central position midway betweentwo opposite sides of the weight body. The bearing edge 20 is locatedmidway between the other two opposite sides of the weight body.

In assembling two units the lower unit I is turned substantially atright angles with the upper unit, as shown by Fig. 5, and its head 20 isplaced on the seat 15 of the upper unit. The lower unit is then swungdownwardly into alinement with the upper unit, the bearing edge of thehead 20 turning on the seat, and its opposite edge being raised, asindicated by the arrow in Fig. 5, until it abuts against the stop 16,this occurring when the two unit bodies are in alinement with eachother. The narrowuess of the bearing edge 20 enables it to move freelyon the seat 15 even though the contacting surfaces of the bearing edgeand seat are left rough as they come from the sand mold in which theyare cast, said bearingedge being the only part of the lower unit that isin forcible rubbing contact with the upper unit during the operation ofaliningthe units.

The head 20 of the lower unit simultaneously engages the seat 15 andstop 16 of the upper unit, and is supported by the seat and confined bythe stop against removal from the seat while the units are inapproximate alinement. The ears 21 are preferably providedwith'shoulders 25, which bear on complemental shoulders 26 on the recessback 13, the shoulders 26 projecting under the shoulders 25 and aidingthe seat 15 in supporting the lower unit. The back 13 of the recess inone unit serves as a stop for the shouldered edge of the cars 21 of theother unit and maintains the head 20 in the central position, shown byFig. 1.

The features of the ears 21 having outer side faces and front edges in.alinement with surface portions of the body 12, and

having overhanging rear edges with shoulders 25 which closely fit therear face 13 and the shoulders 26 of a duplicate unit, and also thepresence of the horn 15 and stop 16, all-co-act in holding connectedunits steadily together with no such'looseness as to permit rattling,and also result in leaving a mini mum amount of unoccupled space betweenthe units. Although there is sufliclent space to permit of connection ordisconnection of the units, yet such unoccupied or unfilled space isvery slight, and consequently a connected series of units to give therequired counterbalancing weight requires less vertlcal sllding room 1nthe window casing than when a lesser amount of metal is provided in theconnecting portions of the units. In other words, I provide the maximumamount of weight for the total length of each complete unit.

I claim A sash weight unit composed of an elongated body one end ofwhich is formed with ears 21 having rounded tops and undercut rearportions presenting convex shoulders 25, said ears being connected by aheadQO having its lower surface rounded and curved from one ear to theother, the outer side faces and the front edges of the ears being inalinement with the surface portions of the said body, the other end ofthe body being formed with a transverse recess having a curved rear face13 and with a horn or seat 15 having a transversely rounded uppersurface, the portions of the body at Copies of this patentvmay beobtained for five cents each, by addressing the Gommissioner of Patents,Washington, D. G.

